Faulty Watch

I bought a watch last year at American Swiss South Gate Mall Johannesburg for my wedding anniversary. I have never worn that watch till this in Feb after we cancelled the celebration due Covid 19. When I started wearing the watch I realized that it was faulty an took back immediately to store with the warrantee card for three years. The watch is been fixed but I'm being told to pay for repairs for the watch that I have worn before. I went to store several times and no one is willing to help, all the need is for me to pay the repairs for that watch that is still within the warrantee service and giving me different excuses